Synonym: sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate
CAS Number: 7558-79-4
Linear Formula: Na2HPO4
Molecular Weight: 141.96
EC Number: 231-448-7
MDL Number: MFCD00003496
PubChem Substance ID: 24899856
Packaging
1, 2.5 kg in poly bottle; 100, 500 g in poly bottle; 5, 12 kg in poly drum
Grade: ACS reagent
Assay: =99.0%
Impurities: =0.002% Chloride (Cl); =0.01% Insoluble matter
Loss: =0.2% loss on drying, 105°C
pH: 8.7-9.3 (25 °C, 5% in solution)
pKa (25ºC): (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
Anion Traces: sulfate (SO42-): =0.005%
Cation Traces: Fe: =0.002%; heavy metals (as Pb): =0.001%